package trainingcamp.day02.char_api;


public class 字符串API {
    public static void main(String[] args) {
        String str = "老师,早上好!!!";
        int a = str.length();
        System.out.println(a);
        for (int i = 0 ; i < str.length(); i++){
            System.out.println(str.charAt(i));
        }
    }
}
